cmd/raidz_test/raidz_bench.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (C) 2016 Gvozden Nešković. All rights reserved.
  24  */
  25
  26 #include <sys/zfs_context.h>
  27 #include <sys/time.h>
  28 #include <sys/wait.h>
  29 #include <sys/zio.h>
  30 #include <sys/vdev_raidz.h>
  31 #include <sys/vdev_raidz_impl.h>
  32 #include <stdio.h>
  33
  34 #include <sys/time.h>
  35
  36 #include "raidz_test.h"
  37
  38 #define GEN_BENCH_MEMORY        (((uint64_t)1ULL)<<32)
  39 #define REC_BENCH_MEMORY        (((uint64_t)1ULL)<<29)
  40 #define BENCH_ASHIFT            12
  41 #define MIN_CS_SHIFT            BENCH_ASHIFT
  42 #define MAX_CS_SHIFT            SPA_MAXBLOCKSHIFT
  43
  44 static zio_t zio_bench;
  45 static raidz_map_t *rm_bench;
  46 static size_t max_data_size = SPA_MAXBLOCKSIZE;
  47
  48 static void
  49 bench_init_raidz_map(void)
  50 {
  51         zio_bench.io_offset = 0;
  52         zio_bench.io_size = max_data_size;
  53
  54         /*
  55          * To permit larger column sizes these have to be done
  56          * allocated using aligned alloc instead of zio_data_buf_alloc
  57          */
  58         zio_bench.io_data = raidz_alloc(max_data_size);
  59
  60         init_zio_data(&zio_bench);
  61 }
  62
  63 static void
  64 bench_fini_raidz_maps(void)
  65 {
  66         /* tear down golden zio */
  67         raidz_free(zio_bench.io_data, max_data_size);
  68         bzero(&zio_bench, sizeof (zio_t));
  69 }
  70
  71 static inline void
  72 run_gen_bench_impl(const char *impl)
  73 {
  74         int fn, ncols;
  75         uint64_t ds, iter_cnt, iter, disksize;
  76         hrtime_t start;
  77         double elapsed, d_bw;
  78
  79         /* Benchmark generate functions */
  80         for (fn = 0; fn < RAIDZ_GEN_NUM; fn++) {
  81
  82                 for (ds = MIN_CS_SHIFT; ds <= MAX_CS_SHIFT; ds++) {
  83                         /* create suitable raidz_map */
  84                         ncols = rto_opts.rto_dcols + fn + 1;
  85                         zio_bench.io_size = 1ULL << ds;
  86                         rm_bench = vdev_raidz_map_alloc(&zio_bench,
  87                             BENCH_ASHIFT, ncols, fn+1);
  88
  89                         /* estimate iteration count */
  90                         iter_cnt = GEN_BENCH_MEMORY;
  91                         iter_cnt /= zio_bench.io_size;
  92
  93                         start = gethrtime();
  94                         for (iter = 0; iter < iter_cnt; iter++)
  95                                 vdev_raidz_generate_parity(rm_bench);
  96                         elapsed = NSEC2SEC((double) (gethrtime() - start));
  97
  98                         disksize = (1ULL << ds) / rto_opts.rto_dcols;
  99                         d_bw = (double)iter_cnt * (double)disksize;
 100                         d_bw /= (1024.0 * 1024.0 * elapsed);
 101
 102                         LOG(D_ALL, "%10s, %8s, %zu, %10llu, %lf, %lf, %u\n",
 103                             impl,
 104                             raidz_gen_name[fn],
 105                             rto_opts.rto_dcols,
 106                             (1ULL<<ds),
 107                             d_bw,
 108                             d_bw * (double)(ncols),
 109                             (unsigned) iter_cnt);
 110
 111                         vdev_raidz_map_free(rm_bench);
 112                 }
 113         }
 114 }
 115
 116 void
 117 run_gen_bench(void)
 118 {
 119         char **impl_name;
 120
 121         LOG(D_INFO, DBLSEP "\nBenchmarking parity generation...\n\n");
 122         LOG(D_ALL, "impl, math, dcols, iosize, disk_bw, total_bw, iter\n");
 123
 124         for (impl_name = (char **)raidz_impl_names; *impl_name != NULL;
 125             impl_name++) {
 126
 127                 if (vdev_raidz_impl_set(*impl_name) != 0)
 128                         continue;
 129
 130                 run_gen_bench_impl(*impl_name);
 131         }
 132 }
 133
 134 static void
 135 run_rec_bench_impl(const char *impl)
 136 {
 137         int fn, ncols, nbad;
 138         uint64_t ds, iter_cnt, iter, disksize;
 139         hrtime_t start;
 140         double elapsed, d_bw;
 141         static const int tgt[7][3] = {
 142                 {1, 2, 3},      /* rec_p:   bad QR & D[0]       */
 143                 {0, 2, 3},      /* rec_q:   bad PR & D[0]       */
 144                 {0, 1, 3},      /* rec_r:   bad PQ & D[0]       */
 145                 {2, 3, 4},      /* rec_pq:  bad R  & D[0][1]    */
 146                 {1, 3, 4},      /* rec_pr:  bad Q  & D[0][1]    */
 147                 {0, 3, 4},      /* rec_qr:  bad P  & D[0][1]    */
 148                 {3, 4, 5}       /* rec_pqr: bad    & D[0][1][2] */
 149         };
 150
 151         for (fn = 0; fn < RAIDZ_REC_NUM; fn++) {
 152                 for (ds = MIN_CS_SHIFT; ds <= MAX_CS_SHIFT; ds++) {
 153
 154                         /* create suitable raidz_map */
 155                         ncols = rto_opts.rto_dcols + PARITY_PQR;
 156                         zio_bench.io_size = 1ULL << ds;
 157
 158                         /*
 159                          * raidz block is too short to test
 160                          * the requested method
 161                          */
 162                         if (zio_bench.io_size / rto_opts.rto_dcols <
 163                             (1ULL << BENCH_ASHIFT))
 164                                 continue;
 165
 166                         rm_bench = vdev_raidz_map_alloc(&zio_bench,
 167                                 BENCH_ASHIFT, ncols, PARITY_PQR);
 168
 169                         /* estimate iteration count */
 170                         iter_cnt = (REC_BENCH_MEMORY);
 171                         iter_cnt /= zio_bench.io_size;
 172
 173                         /* calculate how many bad columns there are */
 174                         nbad = MIN(3, raidz_ncols(rm_bench) -
 175                             raidz_parity(rm_bench));
 176
 177                         start = gethrtime();
 178                         for (iter = 0; iter < iter_cnt; iter++)
 179                                 vdev_raidz_reconstruct(rm_bench, tgt[fn], nbad);
 180                         elapsed = NSEC2SEC((double) (gethrtime() - start));
 181
 182                         disksize = (1ULL << ds) / rto_opts.rto_dcols;
 183                         d_bw = (double)iter_cnt * (double)(disksize);
 184                         d_bw /= (1024.0 * 1024.0 * elapsed);
 185
 186                         LOG(D_ALL, "%10s, %8s, %zu, %10llu, %lf, %lf, %u\n",
 187                             impl,
 188                             raidz_rec_name[fn],
 189                             rto_opts.rto_dcols,
 190                             (1ULL<<ds),
 191                             d_bw,
 192                             d_bw * (double)ncols,
 193                             (unsigned) iter_cnt);
 194
 195                         vdev_raidz_map_free(rm_bench);
 196                 }
 197         }
 198 }
 199
 200 void
 201 run_rec_bench(void)
 202 {
 203         char **impl_name;
 204
 205         LOG(D_INFO, DBLSEP "\nBenchmarking data reconstruction...\n\n");
 206         LOG(D_ALL, "impl, math, dcols, iosize, disk_bw, total_bw, iter\n");
 207
 208         for (impl_name = (char **)raidz_impl_names; *impl_name != NULL;
 209             impl_name++) {
 210
 211                 if (vdev_raidz_impl_set(*impl_name) != 0)
 212                         continue;
 213
 214                 run_rec_bench_impl(*impl_name);
 215         }
 216 }
 217
 218 void
 219 run_raidz_benchmark(void)
 220 {
 221         bench_init_raidz_map();
 222
 223         run_gen_bench();
 224         run_rec_bench();
 225
 226         bench_fini_raidz_maps();
 227 }